A206247 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having zero permanent.

49, 8029, 1364224, 4556324929, 14139111560401, 848170637644693504, 48673249000646115009649, 50198078741005740094898080285, 52964434709981480280861081128206336

Offset: 1

Author

R. H. Hardin Feb 05 2012

Keywords

• nonn

Comments

Diagonal of A206255

Examples

			Some solutions for n=4
..3..3..0..1..0....1..2..3..2..2....3..3..2..1..3....0..0..3..1..3
..0..0..0..1..0....0..0..0..0..0....0..0..0..0..0....3..0..0..0..0
..3..2..0..3..0....2..1..3..2..1....1..0..2..0..1....2..0..3..0..1
..0..0..0..1..0....0..0..0..0..0....1..0..1..0..2....3..0..0..0..3
..2..3..0..1..0....1..0..3..3..3....2..0..1..0..3....3..0..3..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..17